• The CIU 901 can support CIM 200, CIM 260, CIM 280 and CIM 500 interfaces for Modbus and GiC/GRM communication The built-in multi-purpose I/O board enables monitoring of standard pumps, sensors, meters and switches via 2X configurable digital input (open circuit voltage 5 VDC)/analog input (0 to 10V/0 to 20 mA/4 to 20 mA), 2X digital input (open circuit voltage 5 VDC) 1X Pt100/Pt1000 input 1X analog output ( 0 to 10 V, maximum output current 1 mA), 1X relay output ( 240 VAC, 2 A) The CIU 901 unit is equipped with a 24 to 240V VAC/VDC internal power supply and can be installed as a wall-mounted unit or on a DIN rail There is no CIM (communications interface module) mounted inside the CIU 900 Integrated LED for power indication Clamps for power supply 24 to 230 VAC/VDC 50/60 Hz, clamps for Grundfos GENIbus (RS 485), socket to mount a Grundfos CIM interface

The CIU 901 is a standard interface unit with integrated I&O board and with internal power supply for Grundfos products that do not support the internal add on modules, to connect via GENIbus to a CIM interface.